Lasers
When you install and maintain equipment, observe standard laser safety precautions
to prevent personnel injury or device damage.
The laser that is emitted by the optical interface board is an invisible infrared ray.
This laser can cause permanent damage to eyes.
During device maintenance, direct eye exposure to the laser light must be avoided.
To prevent device damage when you operate the device, take the following
precautions:
■
Cap any unused optical interfaces and the optical connectors of unused tail
fibers.
■
Use caps when you remove the optical tail fibre that connects to an optical port
that is in use. Cover the optical port on the device and the optical connector of
the tail fibre with dust-proof caps.
■
Use an attenuator when you perform a hardware loopback test on the optical
connector with the tail optical fibre. The attenuator protects the optical transceiver
from the received optical power.
■
Disconnect the optical tail fibre between the peer device and the local device
when you use the Optical Time Domain Effect Reflectometer (OTDR).
Disconnecting the fibre protects the optical transceiver from the optical power
source.
■
Do not remove or insert the optical transceiver that connects to the optical fibre
without proper safety procedures.
See
on page 31.
Optical fibers
The laser beams of the optical interface board or inside the optical fibre may cause
damage to the eyes. Do not expose your eyes to the laser beams.
The safe use of optical fibers ensures proper running of the device and avoids
personnel injuries and device damage.
The fibre connectors and optical fibre interfaces of a laser must be cleaned with
the special tools and the materials that are listed:
■
The special cleaning solvent, isoamylol ,is preferred. Propyl alcohol is the next
best solvent. Other alcohols and formalin are forbidden.
■
Non-woven lens tissue
31
Safety guidelines
Lasers
